From: Ryan Allan <rrallan@...>
Date: 2007-07-02T07:13:12+09:00
Subject: Re: Variable argument number and behaviour

Thank you Stefano.
You're right; the empty? method is nicely obvious.
I do have a further question, however. You've highlighted a problem
with my original idea, but I don't understand it.

> Besides, even if it 
> had been possible, your approach would have had a problem: you wouldn't have 
> been able to distinguish the case of a single nil argument from the case of 
> no arguments:
> 
> function(nil)
> 
> function()
> 
> The correct approach solves this problem: if no arguments are passed,
> sometimes is empty (empty? returns true); otherwise it's not empty, even 
> if all arguments are nil.

What is the difference between no arguments and a single nil argument?
It seems to me that the cases are logically equivalent. Ruby treats them
separately?

Thanks again,
-Ryan

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